The former Airport Kwik Stop is now the Airport General Store and no longer sells gasoline or diesel.

SITE BACKGROUND

The Airport Kwik Stop site begins west of Highway 31 and north of Greenhouse Road and extends generally east and southeast toward the Pend Oreille River. The site was formerly a convenience store that sold gasoline and diesel. The site includes the former Airport Kwik Stop, the former Cabin Grill, and vacant properties north, south and east of the Cabin Grill.

CONTAMINATION

Volatile organic compounds, benzene, toluene, ethylbenzene and xylenes, and gasoline-range petroleum hydrocarbons are in soil and groundwater.

CLEANUP

The Washington Department of Ecology (Ecology) is leading and funding cleanup at the Airport Kwik Stop site because the former owners/operators cannot afford it.

In 2012, Ecology proposed and the public approved (read Ecology’s responses to public comments) a work plan for investigating the extent and locations of contamination and evaluating cleanup options, a process resulting in a feasibility study in 2013.

In early 2012, as part of the investigation, Ecology sampled the drinking water wells of six residences that were potentially impacted by the contaminated groundwater plume, which had shifted directions. Since then, we have installed carbon filters on residential water wells showing contamination.

Ecology installed 10 groundwater monitoring wells at a variety of potentially impacted locations in 2012. Three soil vapor extraction wells were also installed to test efficiency for treating petroleum-contaminated unsaturated soil at the Airport Kwik Stop. Two air-sparge wells were added to evaluate treatment of contamination in saturated soil.

By mid-2012, Ecology shared the results of testing the soil vapor extraction system and proposed to use the technology to reduce contamination while the remedial investigation and feasibility study process continued. We responded to public comments on this interim cleanup action.

In late 2013, the remedial investigation and feasibility study reports were made available for public comment (“View Electronic Documents” at right for remedial investigation supporting information). Ecology responded to public comments on the reports in 2014.

In mid-2014, Ecology proposed additional work to clean up petroleum contamination in soil and groundwater about 35 feet below ground at the former Cabin Grill property. We responded to public comments on the plan.

In 2015, Ecology conducted a pilot test of a new, combined air sparge and soil vapor extraction system near the former Cabin Grill to determine if full-scale treatment system is needed for the site.

Based on the results of the combined air sparge and vapor extraction pilot test, air sparging was added to the remediation system at the Airport Kwik Stop site in 2016. Depending on the performance of the initial five air sparge wells, additional air sparge wells may be installed.

Ecology held a comment period May 22 - June 5, 2017, on a proposed groundwater treatment plan to reduce petroleum contamination. We didn't receive any comments. You can learn more in the  fact sheet that was delivered to nearby residents and was available at the Airport General Store.

ADDITIONAL RESOURCES

• Acronyms used by the Toxics Cleanup Program
• Cleanup Process: Major Steps & Definitions
• Data Submittal Requirements for All Cleanup Sites
• Toxics Cleanup publications